Angularjs return 从没有数据的函数向 return 发送虚拟承诺？

Question

所以我有 clear/delete 一些数据的功能。

return 没有错误。 return 没有数据（时间函数到达 return 时不应该存在）。

需要承诺的代码：

SomeService.close().then(
  function onSuccess() {

如何从 close() 中 return 一些有用的东西，然后可以使用？

//In SomeService
function close(){
 delete that;
 delete those;
 delete etc;
 return $q.defer().resolve().promise;
}

会给我以下错误：

$q.defer(...).resolve(...) is undefined

Answer 1

你的语法有点错误，试试：

function close(){
  delete that;
  delete those;
  delete etc;
  return $q.resolve();
}

Answer 2

您可以为此目的使用 $q.when。

function close(){
  delete that;
  delete those;
  delete etc;
  return $q.when();
}

来自docs：

Wraps an object that might be a value or a (3rd party) then-able promise into a $q promise. This is useful when you are dealing with an object that might or might not be a promise, or if the promise comes from a source that can't be trusted.

Angularjs return 从没有数据的函数向 return 发送虚拟承诺？

Angularjs returning dummy promise from function that have no data to return?

angularjs

angular-promise